44ec501a41
Co-authored-by: Sandhya Viswanathan <sviswanathan@openjdk.org> Co-authored-by: Martin Doerr <mdoerr@openjdk.org> Co-authored-by: Hamlin Li <mli@openjdk.org> Co-authored-by: Thomas Stuefe <stuefe@openjdk.org> Co-authored-by: Amit Kumar <amitkumar@openjdk.org> Co-authored-by: Stefan Karlsson <stefank@openjdk.org> Co-authored-by: Coleen Phillimore <coleenp@openjdk.org> Co-authored-by: Axel Boldt-Christmas <aboldtch@openjdk.org> Reviewed-by: coleenp, stefank, stuefe, phh, ihse, lmesnik, tschatzl, matsaave, rcastanedalo, vpaprotski, yzheng, egahlin
363 lines
15 KiB
Java
363 lines
15 KiB
Java
/*
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* Copyright (c) 2013, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8024927
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* @summary Testing address of compressed class pointer space as best as possible.
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* @requires vm.bits == 64 & !vm.graal.enabled
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* @requires vm.flagless
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* @comment Testing compressed class pointers without compressed oops is not possible
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* on MacOS because the heap is given an arbitrary address that occasionally
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* collides with where we would ideally have placed the compressed class space.
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* @requires os.family != "mac"
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run driver CompressedClassPointers
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*/
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import jdk.test.lib.Platform;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jtreg.SkippedException;
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public class CompressedClassPointers {
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static final String logging_option = "-Xlog:gc+metaspace=trace,metaspace=info,cds=trace";
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static final String reserveCCSAnywhere = "Reserving compressed class space anywhere";
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static final String usesCompactObjectHeadersPat = "UseCompactObjectHeaders 1";
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// Returns true if we are to test the narrow klass base; we only do this on
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// platforms where we can be reasonably shure that we get reproducable placement).
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static boolean testNarrowKlassBase() {
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if (Platform.isWindows()) {
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return false;
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}
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return true;
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}
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// Returns true if the output indicates that the VM uses compact object headers
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static boolean usesCompactObjectHeaders(OutputAnalyzer output) {
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return output.getOutput().contains(usesCompactObjectHeadersPat);
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}
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// Returns true if the output indicates that the ccs is reserved anywhere.
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static boolean isCCSReservedAnywhere(OutputAnalyzer output) {
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if (output.getOutput().contains(reserveCCSAnywhere)) {
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return true;
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} else {
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return false;
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}
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}
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// CDS off, small heap, ccs size default (1G)
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// A small heap should allow us to place the ccs within the lower 32G and thus allow zero based encoding.
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public static void smallHeapTest() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedBaseAddress=8g",
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"-Xmx128m",
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logging_option,
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"-Xshare:off",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (testNarrowKlassBase() && !isCCSReservedAnywhere(output)) {
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output.shouldContain("Narrow klass base: 0x0000000000000000");
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}
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output.shouldHaveExitValue(0);
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}
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// CDS off, small heap, ccs size explicitely set to 1G
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// A small heap should allow us to place the ccs within the lower 32G and thus allow zero based encoding.
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public static void smallHeapTestWith1G() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:CompressedClassSpaceSize=1g",
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"-Xmx128m",
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logging_option,
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"-Xshare:off",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (testNarrowKlassBase() && !isCCSReservedAnywhere(output)) {
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output.shouldContain("Narrow klass base: 0x0000000000000000, Narrow klass shift: 3");
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}
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output.shouldHaveExitValue(0);
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}
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// CDS off, a very large heap, ccs size left to 1G default.
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// We expect the ccs to be mapped somewhere far beyond the heap, such that it is not possible
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// to use zero based encoding.
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public static void largeHeapTest() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+UnlockExperimentalVMOptions",
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"-Xmx30g",
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logging_option,
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"-Xshare:off",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (testNarrowKlassBase() && !Platform.isPPC() && !Platform.isOSX() && !isCCSReservedAnywhere(output)) {
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// PPC: in most cases the heap cannot be placed below 32g so there
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// is room for ccs and narrow klass base will be 0x0. Exception:
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// Linux 4.1.42 or earlier (see ELF_ET_DYN_BASE in JDK-8244847).
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// For simplicity we exclude PPC.
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// OSX: similar.
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output.shouldNotContain("Narrow klass base: 0x0000000000000000");
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output.shouldContain("Narrow klass shift: 0");
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}
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output.shouldHaveExitValue(0);
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}
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// Settings as in largeHeapTest() except for max heap size. We make max heap
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// size even larger such that it cannot fit into lower 32G but not too large
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// for compressed oops.
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// We expect a zerobased ccs.
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public static void largeHeapAbove32GTest() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+UnlockExperimentalVMOptions",
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"-Xmx31g",
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logging_option,
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"-Xshare:off",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (testNarrowKlassBase()) {
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if (!(Platform.isAArch64() && Platform.isOSX()) && !isCCSReservedAnywhere(output)) { // see JDK-8262895
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output.shouldContain("Narrow klass base: 0x0000000000000000");
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if (!Platform.isAArch64() && !Platform.isPPC() && !Platform.isOSX()) {
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output.shouldContain("Narrow klass shift: 0");
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}
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}
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}
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output.shouldHaveExitValue(0);
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}
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// Using large paged heap, metaspace uses small pages.
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public static void largePagesForHeapTest() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-Xmx128m",
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"-XX:+UseLargePages",
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logging_option,
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (testNarrowKlassBase()) {
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output.shouldContain("Narrow klass base:");
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}
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output.shouldHaveExitValue(0);
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}
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public static void heapBaseMinAddressTest() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:HeapBaseMinAddress=1m",
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"-Xlog:gc+heap+coops=debug",
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"-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldContain("HeapBaseMinAddress must be at least");
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output.shouldHaveExitValue(0);
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}
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public static void sharingTest() throws Exception {
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// Test small heaps
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=./CompressedClassPointers.jsa",
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"-Xmx128m",
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"-XX:SharedBaseAddress=8g",
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"-XX:+VerifyBeforeGC",
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"-Xshare:dump",
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"-Xlog:cds,gc+heap+coops=debug");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (output.firstMatch("Shared spaces are not supported in this VM") != null) {
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return;
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}
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try {
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output.shouldContain("Loading classes to share");
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output.shouldHaveExitValue(0);
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pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=./CompressedClassPointers.jsa",
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"-Xmx128m",
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"-XX:SharedBaseAddress=8g",
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"-Xlog:gc+heap+coops=debug",
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"-Xshare:on",
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"-version");
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("sharing");
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output.shouldHaveExitValue(0);
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} catch (RuntimeException e) {
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output.shouldContain("Unable to use shared archive");
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output.shouldHaveExitValue(1);
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}
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}
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public static void smallHeapTestNoCoop() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedBaseAddress=8g",
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"-Xmx128m",
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"-Xlog:gc+metaspace=trace",
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"-Xshare:off",
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"-Xlog:cds=trace",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (!isCCSReservedAnywhere(output) && !usesCompactObjectHeaders(output)) {
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output.shouldContain("Narrow klass base: 0x0000000000000000");
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}
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output.shouldHaveExitValue(0);
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}
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public static void smallHeapTestWith1GNoCoop() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:CompressedClassSpaceSize=1g",
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"-Xmx128m",
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"-Xlog:gc+metaspace=trace",
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"-Xshare:off",
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"-Xlog:cds=trace",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (!isCCSReservedAnywhere(output) && !usesCompactObjectHeaders(output)) {
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output.shouldContain("Narrow klass base: 0x0000000000000000");
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}
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if (!Platform.isAArch64() && !usesCompactObjectHeaders(output) && !Platform.isPPC()) {
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// Currently relax this test for Aarch64 and ppc.
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output.shouldContain("Narrow klass shift: 0");
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}
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output.shouldHaveExitValue(0);
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}
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public static void largeHeapTestNoCoop() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+UnlockExperimentalVMOptions",
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"-Xmx30g",
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"-Xlog:gc+metaspace=trace",
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"-Xshare:off",
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"-Xlog:cds=trace",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (!isCCSReservedAnywhere(output) && !usesCompactObjectHeaders(output)) {
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output.shouldContain("Narrow klass base: 0x0000000000000000");
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}
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if (!Platform.isAArch64() && !usesCompactObjectHeaders(output) && !Platform.isPPC()) {
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// Currently relax this test for Aarch64 and ppc.
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output.shouldContain("Narrow klass shift: 0");
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}
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output.shouldHaveExitValue(0);
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}
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public static void largePagesTestNoCoop() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:+UnlockDiagnosticVMOptions",
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"-Xmx128m",
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"-XX:+UseLargePages",
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"-Xlog:gc+metaspace=trace",
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"-XX:+VerifyBeforeGC", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldContain("Narrow klass base:");
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output.shouldHaveExitValue(0);
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}
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public static void heapBaseMinAddressTestNoCoop() throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:HeapBaseMinAddress=1m",
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"-Xlog:gc+heap+coops=debug",
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"-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldContain("HeapBaseMinAddress must be at least");
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output.shouldHaveExitValue(0);
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}
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public static void sharingTestNoCoop() throws Exception {
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// Test small heaps
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=./CompressedClassPointers.jsa",
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"-Xmx128m",
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"-XX:SharedBaseAddress=8g",
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"-XX:+VerifyBeforeGC",
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"-Xshare:dump",
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"-Xlog:cds,gc+heap+coops=debug");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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if (output.firstMatch("Shared spaces are not supported in this VM") != null) {
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return;
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}
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try {
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output.shouldContain("Loading classes to share");
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output.shouldHaveExitValue(0);
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pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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"-XX:-UseCompressedOops",
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"-XX:+UseCompressedClassPointers",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=./CompressedClassPointers.jsa",
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"-Xmx128m",
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"-XX:SharedBaseAddress=8g",
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"-Xlog:gc+heap+coops=debug",
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"-Xshare:on",
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"-version");
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("sharing");
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output.shouldHaveExitValue(0);
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} catch (RuntimeException e) {
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output.shouldContain("Unable to use shared archive");
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output.shouldHaveExitValue(1);
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}
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}
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public static void main(String[] args) throws Exception {
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smallHeapTest();
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smallHeapTestWith1G();
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largeHeapTest();
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largeHeapAbove32GTest();
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largePagesForHeapTest();
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heapBaseMinAddressTest();
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sharingTest();
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smallHeapTestNoCoop();
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smallHeapTestWith1GNoCoop();
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largeHeapTestNoCoop();
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largePagesTestNoCoop();
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heapBaseMinAddressTestNoCoop();
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sharingTestNoCoop();
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}
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}
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